JSON validation from DRF

[: Anthony: Crawford.]

Hi,

I am trying to create an API that will provide JSON data that is based on Roku JSON specification (https://developer.roku.com/en-ca/docs/specs/direct-publisher-feed-specs/json-dp-spec.md).

The specification requires that the JSON data is a single object { }, not a list array [ ].

So far I am not able to setup the APIView to render JSON data as an object { }.

The ListAPIView always serializes the JSON to an array and not a single object. However, RetrieveAPIView serializes the JSON as a single object.

A sample of the Roku JSON feed:

https://devtools.web.roku.com/samples/roku-developers-feed-v1-rdp.json

I am fairly new to this, and learning as I go. 

code:

```

class RokuContentFeedAPI(APIView):
def get(self, request, format=None):
feed = RokuContentFeed.objects.all().filter(is_public=True)
serializer = RokuContentFeedSerializer(feed, many=True)
return Response(serializer.data) 

```

```

class RokuContentFeedSerializer(serializers.ModelSerializer):
providerName = serializers.CharField(source='provider_name')
language = serializers.StringRelatedField()
rating = RatingSerializerList()
lastUpdated = serializers.DateTimeField(source='last_updated')
movies = MovieSerializerList(many=True)
liveFeeds = LiveFeedSerializerList(many=True, source='live_feeds')
series = SeriesSerializerList(many=True)
shortFormVideos = ShortFormVideoSerializerList(many=True, source='short_form_videos')
tvSpecials = TVSpecialSerializerList(many=True, source='tv_specials')
categories = CategorySerializerList(many=True)
playlists = PlaylistSerializerList(many=True)
class Meta:
model = RokuContentFeed
#read_only_fields = ['is_public']
fields = ['providerName', 'language', 'rating', 'lastUpdated', 'movies', \
'liveFeeds', 'series', 'shortFormVideos', 'tvSpecials', 'categories', 'playlists']

```

Thank for any suggestions

AC

[Leonardo Salvadori]

hi Anthony, as i know, the "many" parameter in your RokuContentFeedSerializer method makes your data an array [ ]. 

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[: Anthony: Crawford.]

Thank you, yes, many=True will turn any field a list. However my issue is that this response data is the main object. It is returning a list of objects [ { } ] instead of one object { }. I changed my view to contain this code for now, but its defintely not a final solution. This code will return a single { } object.

```

class RokuContentFeedListAPI(APIView):
renderer_classes = [JSONRenderer]
pagination_class = None
def get(self, request, format=None):
feeds = RokuContentFeed.objects.first()
serializer = RokuContentFeedSerializerList(feeds)
return Response(serializer.data)

```

[Mehmet Gürol Çay]

As I see in your code, I think you misunderstood the RetrieveAPIView. You cannot get a single object while giving multiple objects. If you create a RetrieveAPIView, you need to know which object is selected. I mean, you need to pass the ID of RokuContentFeed to your get method of RokuContentFeedRetrieveAPI.

code:

```

class RokuContentFeedListAPI(APIView):
   def get(self, request, format=None): 
       feeds = RokuContentFeed.objects.all().filter(is_public=True)
       serializer = RokuContentFeedSerializer(feeds, many=True)
       return Response(serializer.data) 

```

class RokuContentFeedRetrieveApi(APIView):

    def get(self, request, pk, format=None):

           feed = RokuContentFeed.objects.get(pk=pk)

           serializer = RokuContentFeedSerializer(feed)

           return Response(serializer.data) 

```

class RokuContentFeedSerializer(serializers.ModelSerializer):
   providerName = serializers.CharField(source='provider_name')
   language = serializers.StringRelatedField()
   rating = RatingSerializerList()
   lastUpdated = serializers.DateTimeField(source='last_updated')
   movies = MovieSerializerList(many=True)
   liveFeeds = LiveFeedSerializerList(many=True, source='live_feeds')
   series = SeriesSerializerList(many=True)
   shortFormVideos = ShortFormVideoSerializerList(many=True, source='short_form_videos')
   tvSpecials = TVSpecialSerializerList(many=True, source='tv_specials')
   categories = CategorySerializerList(many=True)
   playlists = PlaylistSerializerList(many=True)
   class Meta:
       model = RokuContentFeed
       #read_only_fields = ['is_public']
       fields = ['providerName', 'language', 'rating', 'lastUpdated', 'movies', \
           'liveFeeds', 'series', 'shortFormVideos', 'tvSpecials', 'categories', 'playlists']

```

19 Kasım 2023 Pazar tarihinde saat 03:37:28 UTC+3 itibarıyla : Anthony: Crawford. şunları yazdı:

[: Anthony: Crawford.]

Thank you for your help. This got me going. Cheers